Engine mounting



R. s. TROTT ENGINE MOUNTING 2 Sheets-Sheet 1 Filed 001:. 5, 1

July 30, 1940. R. s. TROTT ENGINE moumme Filed Oct. 5, 1954.

2 Sheets-Sheet 2 III I Patented July 30, 1940 OFFICE ENGINE MOUNTING Rolland .S. Trott, Denver, Colo.

Application October 5, 1934, Seria'l No. 747104 12 Claims.

This invention relates to improvements in engine mountings, particularly for an internal combustion engine unit of a motor vehicle.

An object of the invention is to improve the mounting of such an engine unit while permitting oscillation thereof about a longitudinal axis as a result of the forces incident to the operation thereof.

Another object of the invention is to provide an improved floating member or pedestal tomount an endportion of the engine unit which will permit oscillation of the engine unit about an axis which extends longitudinally of the engine unit approximately through the center of gravity thereof, and which intersects the crank-shaft axis adjacent the rear-mounting, and also about an axis of oscillation which extends approximately coincident with the axis of the crank-shaft or adjacent the crank-shaft, in order to take into consideration the forces due to torque and due to weight or mass.

In carrying out these objects, I provide a mounting comprising a pedestal or bracket whichhas an end portion of the engine unit mounted thereon substantially pivotally, as by means of a strip or block of non-metallic resilient material such as rubber, and this pedestal is mounted. on a strip or block or blocks of non-metallic resilient material, such as rubber, which will permit bodily movement of the pedestal relative to the frame or vehicle.

Another feature of my improved mounting is the use of a strip of non-metallic resilient material for supporting an end portion of the engine unit, which strip has fiat horizontal end portions, and the strip resists transverse movement of the supported portion of the engine unit solely by the resiliency of the non-metallic resilient material itself. This strip of non-metallic resilient material preferably includes fiat horizontal end portions with an arcuate portion intermediate said end portions, and which assists in supporting the weight of the engine unit and in opposing lateral movement of the engine unit.

In carrying out my invention in accordance with the foregoing objects, I have illustrated in the accompanying drawings a preferred embodiment of my invention, together with modifications thereof, in which:

Fig. 1 is a side elevation of an engine unit showing the mountings thereof in section;

Fig. 2 is a front elevation of the engine unit mounted in the frame, the latter being in section; Fig. 3 is a detail vertical sectional view through a portion of the front mountingapproximately on witha downturned flange .l5 bolted or otherwise the line 3--3 of Fig. 2, but with parts of omitted;

Fig. 4 is a transverse vertical sectional view through the front mounting detached;

Fig. 5 is front elevation of a modified form of front mounting which may be used; and

Fig. 6 is a similar View showing a further modification in the front mounting. a

My invention is shown in conjunction with a multiple cylinder internal combustion engine I having the cylinders arranged vertically in'line longitudinally 'of the vehicle, and the engine unit has the usual crankshaft 2 extending longitudinally thereof. A combined flywheel and clutch housing is designated 3, to the rear end of which is rigidly attached the transmission casing 4, all of these parts being permanently connected together and forming a complete engine unit.

' The engine unit is mounted in a motor vehicle chassis frame which includes side channel-members 5 between which extend transverse front and rear frame members '6 and 1 respectively. These transverse frameinembers B and 1 are rigidly attached to the side frame members 5, and together these constitute a major portion of the motor vehicle chassis frame.

The rear portion of the engine unit is mounted on the transverse member 1 by means of'an arcuate block of non-metallic resilient material 8, such as' rubbe'r, the center of which are is approximately coincident with the crankshaft axis. Although the rear mounting 8 is arouate, any other proper substantially pivotal mounting construction may be used so long as it tends to' maintain thelocation of the axis of oscillation approximately coincident with the crankshaft axis at the rear.

As shown in Figs. 1 to 4, the front end portion of the engine unit is mounted on a front pedestal 9 by means of a block orstrip of non-metallic resilient material, such as soft rubber, l0, which block or strip of material In may be of the usual construction for supporting the front end portion of the engine unit on the pedestal 9, and'ordinarily this block or strip I0 is permanentlyse- 45 curedas by vulcanization, or in any other suitable manner, to metal brackets l'l and i2 which are attached respectively to the engine unit and to the pedestali.

pedestal 9 is mounted on the cross-member 5 of the'frame by means of a pillow bracket [3 which has an upwardly curved middle portion 14, and which pillow bracketis seated directly on the transverse frame member 6 and is provided the frame low-bracket and pedestal in the preferred em-,

bodiment of this invention, which is illustrated in Figs. 1 to 4 of the drawings.

The block or strip IT is seated in depressions I8 and I9, respectively, in the pedesta l'9 and pil low-bracket 13, which depressions serve-toxhold the block or strip I! in place and against trans verse movement of the pedestal relative to the pillow-bracket exceptas permitted by the flow.

of the material, and which transverse movement isiresisted solely by, the rubberl .{Ihe upright portions of the block or strip .ll which'upright pertionsare designated 29, in Fig. 4,.alsoassist in resisting transversemovementof thepedestal 9 and the engine unit supported thereorn.

Bolts 21 extend loosely through'thezside flanges of thepedestal 9 and pillow-bracket l3 and through portions of the blOCkjOI' strip .Il therebetween, but with sufiicientclearance around :the bolts 21' so that the bolts doinot interfere. .with movement of the pedestal relativeto the pillowbracket and'do not tend .to prevent transverse. movement of the pedestalrelative to .its support,

such transverse movement. being ,opposed solely by the, resiliency of the rubber of the block or strip-H.- p

Each of the bolts 2| carries acap-Washer-ZZ against which a spring 23 bears, the opposite end of which spring is-seated in a cup .24 formed in the upper end ofthe base fiangeof the pedestal 9, so that the spring 523 bears, against the base flange of the pedestal tending to prevent dis-; placement thereof or substantial upward swingingmotion of the pedestal,-relative.'to the pillowbracket I3.

:The mounting of the engine. unit on-the mounting members 8 and l0 permits oscillation of the engine unit about .an.axis designated-=G-G in Fig, 1, which extends approximately through the center of gravity or weight ofthe engine unit,

and which axis of oscillation takes into consideration' principally the weight or; mass of the engine unit. The arcuate portion of thestrip or block ll of the frontvmounting hasits-center approximately at the crank-shaft axis of the engine unit and thereby locates a secondary axis of oscillation designated C'C in Fig. 1, which extends approxiv matelycoincidentwith the-crank-shaft axes, al-' though this front mounting may be varied tolocate the axis CC slightly spaced above the crank-shaft axis if such location should befound desirable and preferable for some typesof engine units." w

Due to the resiliency and substantial thickness of the mounting members l0 and I1 at-the front of. the engine unity'a certain amount of vertical movement of the engine unit will-be permittedabout a point approximately at the intersection of the axes CC and 'G-G at thew-rear of the engine unit. This mounting. of :the engine'unit permits restrained-freedom of movement in any" direction approximately in .an orbit; which freedomoi movement is in addition-to; or combined ,..time and the force cushioning movements reduired by the engine unit.

During-oscillation of the engine unit about the .axis C C the pedestal 9 will tend to rock or floaton the rubber member ll, but the transverse motion .of. the engine unit will be opposed by said rubber member. In the form shown in Figs. 1 to '4, the weight of the engine unit at thexfront is carried n ot only by the arcuate portion'ofthe engine portion but also bythe horizontal end portienswhichserve to carry some of tl1e-.weigl it..

instead of the; ll, any other construction' suitable fortheflpurpose may be used, so long as it providesfor substantially pivotal movement and combines this with resiliently opposed transverse movement in any direction but having the improved featuresof 'this'inv ention.

v In the mo'dification. h own in Fig. ,5, a. pedestal 2.! oiytriangularshapesupportstthe front end portion ofthe engine .unitonlthe usual rubber mounting i0 and the pedestal is mounted on the transverse-frame membenfi by-means of rubber I mounting blocks which arehoused within cups 3 5-, secured respectively tothe pedestal 2 9 and the frame member 6'.

-In' the. furtherimodificationshown in Fig. 6, the

pedes'talsZ is. mounted, on av cross .frame member 33 by means of rubber mountings 34,.each of.

which: is similar to; the -mounting Ill-and has a blockor-stripof rubberor similarnon-metallic material vulcanized between metal plates which are attached grespectively'topedestal 32 and the cross frame -member.-33..-.-;,.. v

.-The :forms ofsthez-inrvention..shownv in Figs. 5 and.=fi will locate .the. pivot point. C midway between thein only-when the-two horizontally. separatedfrubber mountings 3,0, or 34, move the .same

amount at the same time and in. opposite directions, but these forms tend to make the pedestal slightly more stable than. Fig. el'while still .providing qfor. considerable cushioning movement.

This movement, when combined withthe movement about the-axis6.6,- vwill help. to overcome thelack of perfection iwhen. the-.two separated lower mountings. do t. not ..locate. the pivot point midway betw een them. i The modified forms shown in. -igs.-5 and'6 may be used, if desired fer some. operatingconditions, and; will have the same' general efiects produced by the form sh0wn.in.Figs. l'to 4,-although the latter may be preferable because itv affords a bettmvmountingforthepedestal 9 and locates the lower pivot point more certainly. 1 I

Iclaim: l v lqA-mount'ingfdtanend portion of an engine unit comprising a pedestal, and'means for supporting- :said pedestal "including non-metallic resilientmaterial having an intermediate arouatexportion terminating in approximately horizontal end" portions supporting the pedestal.

s 2.'Th'e combination with a frame;-and an internal' combustion-engineunit;. ofumeans. for

mounting said engine unit on the frame and providing for oscillation of the engine Lmit about a longitudinal axis in response to the impulses incident to the operation thereof, said mounting means including a pedestal having a non-metallic resilient support for an end portion of the engine unit, and non-metallic resilient means having supporting engagement with vertically and. horizontally spaced portions of the pedestal.

3. The combination with a frame, and an internal combustion engine unit, of means for mounting said engine unit on the frame for oscillation about a longitudinal axis in response to the impulses incident to the operation thereof, said mounting means including spaced approximately horizontal portions of non-metallic resilient material having an approximately arcuate portion of said material therebetween located approximately in a vertical longitudinal plane in which said longitudinal axis extends and supporting a portion of the engine unit.

4. The combination with a frame, and an internal combustion engine unit, of means for mounting said engine unit on the frame for oscillation about a longitudinal axis in response to the impulses incident to the operation thereof, said mounting means including a strip of nonmetallic resilient material having an arcuate portion terminating in approximately horizontal portions at the ends of said arcuate portion located approximately in a vertical longitudinal plane in which said longitudinal axis extends and supporting a portion of the engine unit.

5. The combination with a frame, and an internal combustion engine unit, of means for mounting said engine unit on the frame for oscillation about a longitudinal axis in response to the impulses incident to the operation thereof, said mounting means including a strip of nonmetallic resilient material supporting at least a portion of the weight of the engine unit and having fiat horizontal end portions and resisting transverse movement of said portion of the engine unit solely by the material intermediate the extreme ends of the strip.

6. A mounting for an internal combustion engine unit including a frame structure, and means on said frame structure for oscillatively supporting said engine unit including a mounting member interposed between said frame structure and one portion of said unit comprising a substantially rigid intermediate part, an upper yieldable non-metallic element connecting said intermediate part and engine unit and adapted to accommodate oscillatory movement of the latter and a lower non-metallic yieldable element interposed between and fixed to said intermediate part and frame structure respectively, said lower resilient element having upwardly extending portions adjacent respectively opposite side portions of said intermediate part for yieldably holding the latter and the corresponding portion of said engine unit against lateral movement. I

'7. A mounting for an internal combustion engine unit including a frame structure, and means on said frame structure for oscillatively supporting said engine unit including a mounting member interposed between said frame structure and one portion of said unit comprising'a substantially rigid pedestal, an upper yieldable non-metallic element connecting said pedestal and engine unit and adapted to accommodate oscillatory movement of the latter and lower non-metallic yieldable means interposed between said pedestal and frame structure respectively, said lower resilient means having portions extending upwardly beyond the base of said pedestal for yieldably holding the latter and the corresponding portion of said engine unit against lateral movement.

8. A mounting for an internal combustion engine unit including a frame structure, and means on said frame structure for oscillatively supporting said engine unit including a mounting member interposed between said frame structure and one portion of said unit comprising a substantially rigid pedestal, an upper yieldable non-metallic element-connecting said pedestal and engine unit and adapted to accommodate oscillatory movement of the latter, and lower non-me tallic yieldable means interposed between said pedestal and frame structure respectively, said lower resilient means having horizontal portions and other portions extending upwardly beside portions of the pedestal base for yieldably hold ing the latter and the corresponding portion of said engine unitagainst lateral movement.

9. In a motor vehicle having a frame structure, the combination with an engine unit, of means mounting said engine unit in the vehicle for oscillatory movement relative tothe frame structure, said mounting means comprising a mounting member interposed between said frame structure and a portion of said unit including a substantially rigid pedestal, an upper yieldable nonmetallic element connecting said pedestal and engine unit and adapted to accommodate but resiliently resist oscillatory movement of the latter, and thereby tend tomove the pedestal base horizontally and lower non-metallic yieldable means interposed between said pedestal and frame structure respectively, said lower resilient means having horizontal portions and other portions positioned with respect to the, pedestal to resiliently resist said horizontal movement of the base of the pedestal.

10. The combination of a frame structure, an engine unit, a pedestal interposed between the frame structure and engine, yieldable means; between the frame and the pedestal having both horizontal and downwardly extending portions substantially filling a space between corresponding portions of the frame and pedestal.

11. In an engine mounting, the combination of a frame, an engine unit, a pedestal interposed between the frame and engine unit, providing a support for the latter, resilient non-metallic means interposed between the pedestal and frame, and a second resilient means between the engine unit and the pedestal, the central portion of said first means extending substantially horizontally and having the ends at an angle to said central portion, said resilient means substantially filling the space between corresponding portions of the frame and pedestal for cushioning the engine unit at two points in series.

12. The combination of a frame, an engine unit, means for mounting said engine unit on the frame for oscillation about a longitudinal axis in response to the impulses incident to the operation of the engine, said mounting means including a pedestal, resilient means interposed between and secured to the pedestal and frame, said frame and pedestal at least partially enclosing the resilient means and affording lateral support therefor, and thereby absorbing vertical and transverse vibrations of. the engine unit.

' ROLLAND S. TROTT. 

